Gradle

I was previously using Flixel 4.2, lime 2.9.1 and openfl 3.6.1 to build on Android. I was overriding the default AndroidManifest.xml file using my own custom templates folder as described here: https://player03.com/2014/08/14/template-basics. Everything worked great, my AndroidManifest's min sdk version was 9 and my target was 26.

But now after upgrading to Flixel 4.4, lime 6.3.1, and openfl 8.1.1 I'm having trouble building on Android. I got all my extensions to work but now for some reason my AndroidManifest.xml keeps getting replaced by an auto-generated one I believe gradle is making. My old version was using Ant I believe so Gradle is completely new to me.

Does anyone know how and where to edit Gradle? Any help is appreciated, thank you!